Community price on backpack.tf: 125 keys, last changed 2025-10-11 (11mo ago). The live quote above, 99.6 keys, is 20% lower and last moved 7h ago. They are different measures: the quote is what traders and bots are asking and bidding on the classifieds right now, and it moves for thousands of items every day; the community price is a suggestion accepted by vote, which changes only when someone argues it should. A quote well away from the vote is usually a price that is about to be re-argued. Community prices from backpack.tf, read under an hour ago.
Price history
38 observations
Interactive chart. Press the left and right arrow keys to move along the series, Home or End to jump to either end, Escape to clear.
The key axis converts at today's rate. Prices are recorded in metal, so a line that is flat in keys followed the key rate rather than standing still.
Phosphorous Engineer's Cap sell price, 2025-09-25 to 2026-09-05: 38 observations, from 63.1 keys to 99.6 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
63.1 keys
51.6 keys
30 SEP 2025 · 20:09 UTC
63.0 keys
51.5 keys
9 OCT 2025 · 07:54 UTC
60.2 keys
54.2 keys
19 OCT 2025 · 19:39 UTC
117 keys
106 keys
25 OCT 2025 · 15:57 UTC
112 keys
101 keys
9 NOV 2025 · 23:57 UTC
118 keys
106 keys
17 NOV 2025 · 04:31 UTC
12.6 keys
12.6 keys
23 JUN 2026 · 03:13 UTC
71.7 keys
62.4 keys
1 JUL 2026 · 19:13 UTC
80.2 keys
69.8 keys
9 JUL 2026 · 14:45 UTC
76.1 keys
66.2 keys
15 JUL 2026 · 08:44 UTC
80.5 keys
70.0 keys
29 JUL 2026 · 02:45 UTC
53.7 keys
46.7 keys
3 AUG 2026 · 00:24 UTC
88.5 keys
77.0 keys
13 AUG 2026 · 17:12 UTC
78.1 keys
68.0 keys
19 AUG 2026 · 14:10 UTC
95.8 keys
83.3 keys
21 AUG 2026 · 20:09 UTC
96.3 keys
83.8 keys
22 AUG 2026 · 08:08 UTC
97.1 keys
84.4 keys
22 AUG 2026 · 20:08 UTC
97.7 keys
85.0 keys
23 AUG 2026 · 08:08 UTC
98.3 keys
85.5 keys
23 AUG 2026 · 20:09 UTC
98.7 keys
85.8 keys
24 AUG 2026 · 08:08 UTC
98.6 keys
85.8 keys
24 AUG 2026 · 20:09 UTC
99.3 keys
86.3 keys
25 AUG 2026 · 10:08 UTC
99.5 keys
86.5 keys
25 AUG 2026 · 22:09 UTC
99.6 keys
86.6 keys
26 AUG 2026 · 10:08 UTC
100 keys
87.0 keys
26 AUG 2026 · 22:09 UTC
100 keys
87.1 keys
27 AUG 2026 · 10:08 UTC
100 keys
87.4 keys
27 AUG 2026 · 22:09 UTC
101 keys
87.5 keys
28 AUG 2026 · 11:22 UTC
101 keys
88.0 keys
28 AUG 2026 · 22:09 UTC
101 keys
88.2 keys
29 AUG 2026 · 10:09 UTC
101 keys
88.2 keys
29 AUG 2026 · 22:09 UTC
102 keys
88.7 keys
30 AUG 2026 · 10:08 UTC
104 keys
90.6 keys
31 AUG 2026 · 02:09 UTC
101 keys
88.0 keys
31 AUG 2026 · 18:09 UTC
101 keys
88.1 keys
3 SEP 2026 · 08:08 UTC
99.3 keys
86.3 keys
4 SEP 2026 · 04:08 UTC
100.0 keys
86.9 keys
5 SEP 2026 · 12:09 UTC
99.6 keys
86.6 keys
Price history in numbers
38 readings since 25 Sep 2025
Over the last 30 days the Phosphorous Engineer's Cap's sell price ranged from 78.1 keys to 104 keys and is up 27.6% after 24 moves. Over a year it ranged from 12.6 keys to 118 keys (up 57.8%). Today's 99.6 keys sits in the upper third of its range: the lowest we have recorded is 12.6 keys (17 Nov 2025) and the highest 118 keys (9 Nov 2025). The price has moved 37 times since we began recording it — about once every 9 days.